It is difficult to determine the line that separates the living from the nonliving. Life as a natural phenomenon is the greatest mystery that mankind has been trying to solve for many millennia. Life is an active form of existence of matter, in a sense higher than its physical and chemical forms of existence, naturally occurring under certain conditions in the process of its development; a combination of physical and chemical processes that allow metabolism and reproduction.
Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.